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US20040242667A1 - Method of using cyclooxegenase-2 inhibitors in the treatment and prevention of dementia - Google Patents

Method of using cyclooxegenase-2 inhibitors in the treatment and prevention of dementia Download PDF

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US20040242667A1
US20040242667A1 US10/884,906 US88490604A US2004242667A1 US 20040242667 A1 US20040242667 A1 US 20040242667A1 US 88490604 A US88490604 A US 88490604A US 2004242667 A1 US2004242667 A1 US 2004242667A1
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pyrazol
benzenesulfonamide
trifluoromethyl
dementia
alkyl
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Philip Needleman
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GD Searle LLC
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GD Searle LLC
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/63—Compounds containing para-N-benzenesulfonyl-N-groups, e.g. sulfanilamide, p-nitrobenzenesulfonyl hydrazide
    • A61K31/635—Compounds containing para-N-benzenesulfonyl-N-groups, e.g. sulfanilamide, p-nitrobenzenesulfonyl hydrazide having a heterocyclic ring, e.g. sulfadiazine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
    • A61K31/415—1,2-Diazoles

Definitions

  • This invention is in the field of the prevention and treatment of dementia. More specifically, this invention relates to the use of cyclooxygenase-2 inhibitors or derivatives thereof in preventing and treating Alzheimer's Disease.
  • NSAID's common non-steroidal anti-inflammatory drugs
  • corticosteroids An alternative to NSAID's is the use of corticosteroids, which also produce adverse effects, especially when long term therapy is involved.
  • NSAIDs have been found to prevent the production of prostaglandins by inhibiting enzymes in the human arachidonic acid/prostaglandin pathway, including the enzyme cyclooxygenase (COX).
  • COX cyclooxygenase-2
  • prostaglandin G/H synthase II an inducible enzyme associated with inflammation
  • Dementia characterized by memory loss, confusion, and disorientation is suffered by fifteen percent of the American elderly population. Of that number, about sixty percent suffer from the progressive mental deterioration known as Alzheimer's disease.
  • Alzheimer's disease causes the death of brain cells, often begins in the portion of the brain responsible for memory control. The onset is normally gradual, often symptomized by the loss of short term memory. In the late stages of the disease the patient becomes dissoriented and ultimately becomes unable to care for themselves.
  • [Pyrazol-1-yl]benzenesulfonamides have been described in WO95/15316 as inhibitors of cyclooxygenase-2 and have shown promise in the treatment of inflammation, arthritis, and pain, with minimal side effects in pre-clinical and clinical trials.
  • their use for treating central nervous system disorders, including dementia or specifically for treating or preventing other Alzheimer's disease has not been previously described.
  • the present invention is directed to the use of inhibitors of cyclooxygenase-2 for the treatment and prevention of dementia.
  • the present invention provides a method for treating or preventing dementia in a subject in need of such treatment or prevention, the method comprises administering to the subject a therapeutically effective amount of a cyclooxygenase-2 inhibitor or derivative thereof.
  • treatment includes partial or total inhibition of the dementia, including Alzheimer's disease, vascular dementia, multi-infarct dementia, pre-senile dementia, alcoholic dementia, and senile dementia.
  • prevention includes either preventing the onset of clinically evident dementia altogether or preventing the onset of a preclinically evident stage of dementia in individuals at risk. Also intended to be encompassed by this definition is the prevention of initiation brain cell death or to arrest or reverse the progression of Alzheimer's disease symptoms. This includes prophylactic treatment of those at risk of developing dementia.
  • the phrase “therapeutically-effective” is intended to qualify the amount of each agent which will achieve the goal of improvement in disease severity and the frequency of incidence over treatment of each agent by itself, while avoiding adverse side effects typically associated with alternative therapies.
  • the term “subject” for purposes of treatment includes any human or animal subject who has any one of the known dementia, and preferably is a human subject.
  • the subject is any human or animal subject, and preferably is a human subject who is at risk for dementia.
  • the subject may be at risk due to exposure to head injury, being exposed to other environmental factors associated with Alzheimer's disease and being genetically predisposed to have the dementia.
  • dementia includes Alzheimer's disease, vascular dementia, multi-infarct dementia, pre-senile dementia, alcoholic dementia, and senile dementia.
  • Inhibitors of the cyclooxygenase pathway in the metabolism of arachidonic acid used in the prevention and treatment of dementia may inhibit enzyme activity through a variety of mechanisms.
  • the inhibitors used in the methods described herein may block the enzyme activity directly by acting as a substrate for the enzyme.
  • the use of cyclooxygenasse-2 selective inhibitors is highly advantageous in that they minimize the gastric side effects that can occur with non-selective NSAID's, especially where prolonged prophylactic treatment is expected.
  • cyclooxygenase-2 inhibitor denotes a compound able to inhibit cyclooxygenase-2 without significant inhibition of cyclooxygenase-1.
  • it includes compounds which have a cyclooxygenase-2 IC 50 of less than about 0.2 ⁇ M, and also have a selectivity ratio of cyclooxygenase-2 inhibition over cyclooxygenase-1 inhibition of at least 50, and more preferably of at least 100.
  • the compounds have a cyclooxygenase-1 IC 50 of greater than about 1 ⁇ M, and more preferably of greater than 10 ⁇ M.
  • the method provided herein relates to the use of cyclooxygenase-2 inhibitors or derivatives thereof in the prevention and treatment of dementia.
  • the cyclooxygenase-2 inhibitor is selected from compounds of Formula I
  • R 2 is selected from hydrido, alkyl, haloalkyl, alkoxycarbonyl, cyano, cyanoalkyl, carboxyl, aminocarbonyl, alkylaminocarbonyl, cycloalkylaminocarbonyl, arylaminocarbonyl, carboxyalkylaminocarbonyl, carboxyalkyl, aralkoxycarbonylalkylaminocarbonyl, aminocarbonylalkyl, alkoxycarbonylcyanoalkenyl and hydroxyalkyl;
  • R 3 is selected from hydrido, alkyl, cyano, hydroxyalkyl, cycloalkyl, alkylsulfonyl and halo;
  • R 4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkenyl and heterocyclic; wherein R 4 is optionally substituted at a substitutable position with one or more radicals selected from halo, alkylthio, alkylsulfonyl, cyano, nitro, haloalkyl, alkyl, hydroxyl, alkenyl, hydroxyalkyl, carboxyl, cycloalkyl, alkylamino, dialkylamino, alkoxycarbonyl, aminocarbonyl, alkoxy, haloalkoxy, sulfamyl, heterocyclic and amino;
  • a class of compounds of particular interest consists of those compounds of Formula I wherein R 2 is selected from hydrido, lower alkyl, lower haloalkyl, lower alkoxycarbonyl, cyano, lower cyanoalkyl, carboxyl, aminocarbonyl, lower alkylaminocarbonyl, lower cycloalkylaminocarbonyl, arylaminocarbonyl, lower carboxyalkylaminocarbonyl, lower aminocarbonylalkyl, lower aralkoxycarbonylalkylaminocarbonyl, lower carboxyalkyl, lower alkoxycarbonylcyanoalkenyl and lower hydroxyalkyl; wherein R 3 is selected from hydrido, lower alkyl, cyano, lower hydroxyalkyl, lower cycloalkyl, lower alkylsulfonyl and halo; and wherein R 4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkyl,
  • a family of specific compounds of particular interest within Formula I consists of compounds, pharmaceutically-acceptable salts and derivatives thereof as follows:
  • a family of specific compounds of more particular interest within Formula I consists of compounds and pharmaceutically-acceptable salts or derivatives thereof as follows:
  • Derivatives are intended to encompass any compounds which are structurally related to the cyclooxygenase-2 inhibitors or which possess the substantially equivalent biologic activity.
  • inhibitors may include, but are not limited to, prodrugs thereof.
  • the compounds utilized in the methods of the present invention may be present in the form of free bases or pharmaceutically acceptable acid addition salts thereof.
  • pharmaceutically-acceptable salts embraces salts commonly used to form alkali metal salts and to form addition salts of free acids or free bases. The nature of the salt is not critical, provided that it is pharmaceutically-acceptable.
  • Suitable pharmaceutically-acceptable acid addition salts of compounds of Formula I may be prepared from an inorganic acid or from an organic acid. Examples of such inorganic acids are hydrochloric, hydrobromic, hydroiodic, nitric, carbonic, sulfuric and phosphoric acid.
  • organic acids may be selected from aliphatic, cycloaliphatic, aromatic, araliphatic, heterocyclic, carboxylic and sulfonic classes of organic acids, example of which are formic, acetic, propionic, succinic, glycolic, gluconic, lactic, malic, tartaric, citric, ascorbic, glucuronic, maleic, fumaric, pyruvic, aspartic, glutamic, benzoic, anthranilic, mesylic, 4-hydroxybenzoic, phenylacetic, mandelic, embonic (pamoic), methanesulfonic, ethanesulfonic, benzenesulfonic, pantothenic, 2-hydroxyethanesulfonic, toluenesulfonic, sulfanilic, cyclohexylaminosulfonic, stearic, algenic, ⁇ -hydroxybutyric, salicylic, galactaric and galactur
  • Suitable pharmaceutically-acceptable base addition salts of compounds of Formula I include metallic salts made from aluminum, calcium, lithium, magnesium, potassium, sodium and zinc or organic salts made from N,N′-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, ethylenediamine, meglumine (N-methylglucamine) and procaine. All of these salts may be prepared by conventional means from the corresponding compound of Formula I by reacting, for example, the appropriate acid or base with the compound of Formula I.
  • a transgenic mouse model for Alzheimer;s has been described by Hsiao et al. (Science, (1996)].
  • the cyclooxygenasse-2 inhibitors should be active, at a dose of 20 mg/kg.
  • the active compounds of the present invention may be administered by any suitable route known to those skilled in the art, preferably in the form of a pharmaceutical composition adapted to such a route, and in a dose effective for the treatment intended.
  • the active compounds and composition may, for example, be administered orally, intravascularly, intraperitoneally, intranasal, intrabronchial, subcutaneously, intra-muscularly or topically (including aerosol).
  • the administration of the present invention may be for either prevention or treatment purposes.
  • the methods and compositions used herein may be used alone or in conjunction with additional therapies known to those skilled in the art in the prevention or treatment of dementia.
  • the methods and compositions described herein may be used as adjunct therapy.
  • the cyclooxygenase-2 inhibitor may be administered alone or in conjunction with other antineoplastic agents or other growth inhibiting agents or other drugs or nutrients.
  • adjunct therapy in defining use of a cyclooxygenase-2 inhibitor agent and another pharmaceutical agent, is intended to embrace administration of each agent in a sequential manner in a regimen that will provide beneficial effects of the drug combination, and is intended as well to embrace co-administration of these agents in a substantially simultaneous manner, such as in a single formulation having a fixed ratio of these active agents, or in multiple, separate formulations for each agent.
  • the present invention also comprises a pharmaceutical composition for the adjunct prevention and treatment of dementia, comprising a therapeutically-effective amount of a compound of Formula I in association with at least one pharmaceutically-acceptable carrier, adjuvant or diluent (collectively referred to herein as “carrier” materials) and, other antidementia agents or other growth inhibiting agents or other drugs or nutrients.
  • carrier pharmaceutically-acceptable carrier, adjuvant or diluent
  • the pharmaceutical composition may be in the form of, for example, a tablet, capsule, suspension or liquid.
  • the pharmaceutical composition is preferably made in the form of a dosage unit containing a particular amount of the active ingredient.
  • dosage units are capsules, tablets, powders, granules or a suspension, with conventional additives such as lactose, mannitol, corn starch or potato starch; with binders such as crystalline cellulose, cellulose derivatives, acacia, corn starch or gelatins; with disintegrators such as corn starch, potato starch or sodium carboxymethyl-cellulose; and with lubricants such as talc or magnesium stearate.
  • the active ingredient may also be administered by injection as a composition wherein, for example, saline, dextrose or water may be used as a suitable carrier.
  • the compound may be combined with a sterile aqueous solution which is preferably isotonic with the blood of the recipient.
  • a sterile aqueous solution which is preferably isotonic with the blood of the recipient.
  • Such formulations may be prepared by dissolving solid active ingredient in water containing physiologically compatible substances such as sodium chloride, glycine, and the like, and having a buffered pH compatible with physiological conditions to produce an aqueous solution, and rendering said solution sterile.
  • the formulations may be present in unit or multi-dose containers such as sealed ampoules or vials.
  • Formulations suitable for parenteral administration conveniently comprise a sterile aqueous preparation of the active compound which is preferably made isotonic. Preparations for injections may also be formulated by suspending or emulsifying the compounds in non-aqueous solvent, such as vegetable oil, synthetic aliphatic acid glycerides, esters of higher aliphatic acids or propylene glycol.
  • non-aqueous solvent such as vegetable oil, synthetic aliphatic acid glycerides, esters of higher aliphatic acids or propylene glycol.
  • Formulations for topical use include known gels, creams, oils, and the like.
  • the compounds may be formulated with known aerosol exipients, such as saline, and administered using commercially available nebulizers.
  • Formulation in a fatty acid source may be used to enhance biocompatibility.
  • the active ingredient may be formulated into suppositories using bases which are solid at room temperature and melt or dissolve at body temperature.
  • bases include cocoa butter, glycerinated gelatin, hydrogenated vegetable oil, polyethylene glycols of various molecular weights, and fatty esters of polyethylene stearate.
  • the dosage form and amount can be readily established by reference to known central nervous system treatment or prophylactic regiments.
  • the amount of therapeutically active compound that is administered and the dosage regimen for treating a disease condition with the compounds and/or compositions of this invention depends on a variety of factors, including the age, weight, sex and medical condition of the subject, the severity of the disease, the route and frequency of administration, and the particular compound employed, as well as the pharmacokinetic properties of the individual treated, and thus may vary widely.
  • the dosage will generally be lower if the compounds are administered locally rather than systemically, and for prevention rather than for treatment. Such treatments may be administered as often as necessary and for the period of time judged necessary by the treating physician.
  • the pharmaceutical compositions may contain active ingredient in the range of about 0.1 to 2000 mg, preferably in the range of about 0.5 to 500 mg and most preferably between about 1 and 200 mg.
  • the daily dose can be administered in one to four doses per day.

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Abstract

This invention relates to the use of cyclooxygenase-2 inhibitors or derivatives thereof in preventing and treating dementia. In particular, the invention describes the method of preventing and treating dementia in a subject, said method comprising treating the subject with a therapeutically-effective amount of a compound of Formula I
Figure US20040242667A1-20041202-C00001
wherein R2, R3, and R4 are as described in the specification.

Description

    FIELD OF THE INVENTION
  • This invention is in the field of the prevention and treatment of dementia. More specifically, this invention relates to the use of cyclooxygenase-2 inhibitors or derivatives thereof in preventing and treating Alzheimer's Disease. [0001]
    • BACKGROUND OF THE INVENTION
  • Prostaglandins play a major role in the inflammation process and the inhibition of prostaglandin production, especially production of PGG[0002] 2, PGH2 and PGE2, has been a common target of anti-inflammatory drug discovery. However, common non-steroidal anti-inflammatory drugs (NSAID's) that are active in reducing the prostaglandin-induced pain and swelling associated with the inflammation process are also active in affecting other prostaglandin-regulated processes not associated with the inflammation process. Thus, use of high doses of most common NSAID's can produce severe side effects, including life threatening ulcers, that limit their-therapeutic potential. An alternative to NSAID's is the use of corticosteroids, which also produce adverse effects, especially when long term therapy is involved.
  • NSAIDs have been found to prevent the production of prostaglandins by inhibiting enzymes in the human arachidonic acid/prostaglandin pathway, including the enzyme cyclooxygenase (COX). The recent discovery of an inducible enzyme associated with inflammation (named “cyclooxygenase-2 (COX-2)” or “prostaglandin G/H synthase II”) provides a viable target of inhibition which more effectively reduces inflammation and produces fewer and less drastic side effects. [0003]
  • Dementia, characterized by memory loss, confusion, and disorientation is suffered by fifteen percent of the American elderly population. Of that number, about sixty percent suffer from the progressive mental deterioration known as Alzheimer's disease. [0004]
  • Alzheimer's disease causes the death of brain cells, often begins in the portion of the brain responsible for memory control. The onset is normally gradual, often symptomized by the loss of short term memory. In the late stages of the disease the patient becomes dissoriented and ultimately becomes unable to care for themselves. [0005]
  • U.S. Pat. No. 5,192,753 (McGeer et al.) describes the use of the NSAID indomethacin for treatment of dementia. WO patent publication WO94/13635 (published Jun. 23, 1994) describes the use of specific COX-2 compounds for the treatment of Alzheimer's disease. [0006]
  • [Pyrazol-1-yl]benzenesulfonamides have been described in WO95/15316 as inhibitors of cyclooxygenase-2 and have shown promise in the treatment of inflammation, arthritis, and pain, with minimal side effects in pre-clinical and clinical trials. However, their use for treating central nervous system disorders, including dementia or specifically for treating or preventing other Alzheimer's disease has not been previously described. [0007]
  • The present invention is directed to the use of inhibitors of cyclooxygenase-2 for the treatment and prevention of dementia. [0008]
    • DETAILED DESCRIPTION OF THE INVENTION
  • The present invention provides a method for treating or preventing dementia in a subject in need of such treatment or prevention, the method comprises administering to the subject a therapeutically effective amount of a cyclooxygenase-2 inhibitor or derivative thereof. [0009]
  • The term “treatment” includes partial or total inhibition of the dementia, including Alzheimer's disease, vascular dementia, multi-infarct dementia, pre-senile dementia, alcoholic dementia, and senile dementia. [0010]
  • The term “prevention” includes either preventing the onset of clinically evident dementia altogether or preventing the onset of a preclinically evident stage of dementia in individuals at risk. Also intended to be encompassed by this definition is the prevention of initiation brain cell death or to arrest or reverse the progression of Alzheimer's disease symptoms. This includes prophylactic treatment of those at risk of developing dementia. [0011]
  • The phrase “therapeutically-effective” is intended to qualify the amount of each agent which will achieve the goal of improvement in disease severity and the frequency of incidence over treatment of each agent by itself, while avoiding adverse side effects typically associated with alternative therapies. [0012]
  • The term “subject” for purposes of treatment includes any human or animal subject who has any one of the known dementia, and preferably is a human subject. For methods of prevention, the subject is any human or animal subject, and preferably is a human subject who is at risk for dementia. The subject may be at risk due to exposure to head injury, being exposed to other environmental factors associated with Alzheimer's disease and being genetically predisposed to have the dementia. [0013]
  • In the method above, dementia includes Alzheimer's disease, vascular dementia, multi-infarct dementia, pre-senile dementia, alcoholic dementia, and senile dementia. [0014]
  • Inhibitors of the cyclooxygenase pathway in the metabolism of arachidonic acid used in the prevention and treatment of dementia may inhibit enzyme activity through a variety of mechanisms. By the way of example, the inhibitors used in the methods described herein may block the enzyme activity directly by acting as a substrate for the enzyme. The use of cyclooxygenasse-2 selective inhibitors is highly advantageous in that they minimize the gastric side effects that can occur with non-selective NSAID's, especially where prolonged prophylactic treatment is expected. [0015]
  • The term “cyclooxygenase-2 inhibitor” denotes a compound able to inhibit cyclooxygenase-2 without significant inhibition of cyclooxygenase-1. Preferably, it includes compounds which have a cyclooxygenase-2 IC[0016] 50 of less than about 0.2 μM, and also have a selectivity ratio of cyclooxygenase-2 inhibition over cyclooxygenase-1 inhibition of at least 50, and more preferably of at least 100. Even more preferably, the compounds have a cyclooxygenase-1 IC50 of greater than about 1 μM, and more preferably of greater than 10 μM.
  • The method provided herein relates to the use of cyclooxygenase-2 inhibitors or derivatives thereof in the prevention and treatment of dementia. Preferably, the cyclooxygenase-2 inhibitor is selected from compounds of Formula I [0017]
    Figure US20040242667A1-20041202-C00002
  • wherein R[0018] 2 is selected from hydrido, alkyl, haloalkyl, alkoxycarbonyl, cyano, cyanoalkyl, carboxyl, aminocarbonyl, alkylaminocarbonyl, cycloalkylaminocarbonyl, arylaminocarbonyl, carboxyalkylaminocarbonyl, carboxyalkyl, aralkoxycarbonylalkylaminocarbonyl, aminocarbonylalkyl, alkoxycarbonylcyanoalkenyl and hydroxyalkyl;
  • wherein R[0019] 3 is selected from hydrido, alkyl, cyano, hydroxyalkyl, cycloalkyl, alkylsulfonyl and halo; and
  • wherein R[0020] 4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkenyl and heterocyclic; wherein R4 is optionally substituted at a substitutable position with one or more radicals selected from halo, alkylthio, alkylsulfonyl, cyano, nitro, haloalkyl, alkyl, hydroxyl, alkenyl, hydroxyalkyl, carboxyl, cycloalkyl, alkylamino, dialkylamino, alkoxycarbonyl, aminocarbonyl, alkoxy, haloalkoxy, sulfamyl, heterocyclic and amino;
  • or a pharmaceutically-acceptable salt or derivative thereof. [0021]
  • A class of compounds of particular interest consists of those compounds of Formula I wherein R[0022] 2 is selected from hydrido, lower alkyl, lower haloalkyl, lower alkoxycarbonyl, cyano, lower cyanoalkyl, carboxyl, aminocarbonyl, lower alkylaminocarbonyl, lower cycloalkylaminocarbonyl, arylaminocarbonyl, lower carboxyalkylaminocarbonyl, lower aminocarbonylalkyl, lower aralkoxycarbonylalkylaminocarbonyl, lower carboxyalkyl, lower alkoxycarbonylcyanoalkenyl and lower hydroxyalkyl; wherein R3 is selected from hydrido, lower alkyl, cyano, lower hydroxyalkyl, lower cycloalkyl, lower alkylsulfonyl and halo; and wherein R4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkenyl and heterocyclic; wherein R4 is optionally substituted at a substitutable position with one or more radicals selected from halo, lower alkylthio, lower alkylsulfonyl, cyano, nitro, lower haloalkyl, lower alkyl, hydroxyl, lower alkenyl, lower hydroxyalkyl, carboxyl, lower cycloalkyl, lower alkylamino, lower dialkylamino, lower alkoxycarbonyl, aminocarbonyl, lower alkoxy, lower haloalkoxy, sulfamyl, five or six membered heterocyclic and amino; or a pharmaceutically-acceptable salt or derivative thereof.
  • A family of specific compounds of particular interest within Formula I consists of compounds, pharmaceutically-acceptable salts and derivatives thereof as follows: [0023]
  • 4-[5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0024]
  • 4-[5-phenyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0025]
  • 4-[5-(4-fluorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0026]
  • 4-[5-(4-methoxyphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0027]
  • 4-[5-(4-chlorophenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0028]
  • 4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0029]
  • 4-[4-chloro-5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0030]
  • 4-[3-(difluoromethyl)-5-(4-methylphenyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0031]
  • 4-[3-(difluoromethyl)-5-phenyl-1H-pyrazol-1-yl]benzenesulfonamide; [0032]
  • 4-[3-(difluoromethyl)-5-(4-methoxyphenyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0033]
  • 4-[3-cyano-5-(4-fluorophenyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0034]
  • 4-[3-(difluoromethyl)-5-(3-fluoro-4-methoxyphenyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0035]
  • 4-[5-(3-fluoro-4-methoxyphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0036]
  • 4-[4-chloro-5-phenyl-1H-pyrazol-1-yl]benzenesulfonamide; [0037]
  • 4-[5-(4-chlorophenyl)-3-(hydroxymethyl)-1H-pyrazol-1-yl]benzenesulfonamide; and [0038]
  • 4-[5-(4-(N,N-dimethylamino)phenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide. [0039]
  • A family of specific compounds of more particular interest within Formula I consists of compounds and pharmaceutically-acceptable salts or derivatives thereof as follows: [0040]
  • 4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; [0041]
  • 4-[5-(4-chlorophenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide; and [0042]
  • 4-[5-(3-fluoro-4-methoxyphenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide. [0043]
  • Derivatives are intended to encompass any compounds which are structurally related to the cyclooxygenase-2 inhibitors or which possess the substantially equivalent biologic activity. By way of example, such inhibitors may include, but are not limited to, prodrugs thereof. [0044]
  • The compounds utilized in the methods of the present invention may be present in the form of free bases or pharmaceutically acceptable acid addition salts thereof. The term “pharmaceutically-acceptable salts” embraces salts commonly used to form alkali metal salts and to form addition salts of free acids or free bases. The nature of the salt is not critical, provided that it is pharmaceutically-acceptable. Suitable pharmaceutically-acceptable acid addition salts of compounds of Formula I may be prepared from an inorganic acid or from an organic acid. Examples of such inorganic acids are hydrochloric, hydrobromic, hydroiodic, nitric, carbonic, sulfuric and phosphoric acid. Appropriate organic acids may be selected from aliphatic, cycloaliphatic, aromatic, araliphatic, heterocyclic, carboxylic and sulfonic classes of organic acids, example of which are formic, acetic, propionic, succinic, glycolic, gluconic, lactic, malic, tartaric, citric, ascorbic, glucuronic, maleic, fumaric, pyruvic, aspartic, glutamic, benzoic, anthranilic, mesylic, 4-hydroxybenzoic, phenylacetic, mandelic, embonic (pamoic), methanesulfonic, ethanesulfonic, benzenesulfonic, pantothenic, 2-hydroxyethanesulfonic, toluenesulfonic, sulfanilic, cyclohexylaminosulfonic, stearic, algenic, β-hydroxybutyric, salicylic, galactaric and galacturonic acid. Suitable pharmaceutically-acceptable base addition salts of compounds of Formula I include metallic salts made from aluminum, calcium, lithium, magnesium, potassium, sodium and zinc or organic salts made from N,N′-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, ethylenediamine, meglumine (N-methylglucamine) and procaine. All of these salts may be prepared by conventional means from the corresponding compound of Formula I by reacting, for example, the appropriate acid or base with the compound of Formula I. [0045]
    • Materials and Methods
  • A transgenic mouse model for Alzheimer;s has been described by Hsiao et al. (Science, (1996)]. The cyclooxygenasse-2 inhibitors should be active, at a dose of 20 mg/kg. [0046]
  • The active compounds of the present invention may be administered by any suitable route known to those skilled in the art, preferably in the form of a pharmaceutical composition adapted to such a route, and in a dose effective for the treatment intended. The active compounds and composition may, for example, be administered orally, intravascularly, intraperitoneally, intranasal, intrabronchial, subcutaneously, intra-muscularly or topically (including aerosol). [0047]
  • The administration of the present invention may be for either prevention or treatment purposes. The methods and compositions used herein may be used alone or in conjunction with additional therapies known to those skilled in the art in the prevention or treatment of dementia. Alternatively, the methods and compositions described herein may be used as adjunct therapy. By way of example, the cyclooxygenase-2 inhibitor may be administered alone or in conjunction with other antineoplastic agents or other growth inhibiting agents or other drugs or nutrients. [0048]
  • The phrase “adjunct therapy” (or “combination therapy”), in defining use of a cyclooxygenase-2 inhibitor agent and another pharmaceutical agent, is intended to embrace administration of each agent in a sequential manner in a regimen that will provide beneficial effects of the drug combination, and is intended as well to embrace co-administration of these agents in a substantially simultaneous manner, such as in a single formulation having a fixed ratio of these active agents, or in multiple, separate formulations for each agent. The present invention also comprises a pharmaceutical composition for the adjunct prevention and treatment of dementia, comprising a therapeutically-effective amount of a compound of Formula I in association with at least one pharmaceutically-acceptable carrier, adjuvant or diluent (collectively referred to herein as “carrier” materials) and, other antidementia agents or other growth inhibiting agents or other drugs or nutrients. [0049]
  • For oral administration, the pharmaceutical composition may be in the form of, for example, a tablet, capsule, suspension or liquid. The pharmaceutical composition is preferably made in the form of a dosage unit containing a particular amount of the active ingredient. Examples of such dosage units are capsules, tablets, powders, granules or a suspension, with conventional additives such as lactose, mannitol, corn starch or potato starch; with binders such as crystalline cellulose, cellulose derivatives, acacia, corn starch or gelatins; with disintegrators such as corn starch, potato starch or sodium carboxymethyl-cellulose; and with lubricants such as talc or magnesium stearate. The active ingredient may also be administered by injection as a composition wherein, for example, saline, dextrose or water may be used as a suitable carrier. [0050]
  • For intravenous, intramuscular, subcutaneous, or intraperitoneal administration, the compound may be combined with a sterile aqueous solution which is preferably isotonic with the blood of the recipient. Such formulations may be prepared by dissolving solid active ingredient in water containing physiologically compatible substances such as sodium chloride, glycine, and the like, and having a buffered pH compatible with physiological conditions to produce an aqueous solution, and rendering said solution sterile. The formulations may be present in unit or multi-dose containers such as sealed ampoules or vials. [0051]
  • Formulations suitable for parenteral administration conveniently comprise a sterile aqueous preparation of the active compound which is preferably made isotonic. Preparations for injections may also be formulated by suspending or emulsifying the compounds in non-aqueous solvent, such as vegetable oil, synthetic aliphatic acid glycerides, esters of higher aliphatic acids or propylene glycol. [0052]
  • Formulations for topical use include known gels, creams, oils, and the like. For aerosol delivery, the compounds may be formulated with known aerosol exipients, such as saline, and administered using commercially available nebulizers. Formulation in a fatty acid source may be used to enhance biocompatibility. [0053]
  • For rectal administration, the active ingredient may be formulated into suppositories using bases which are solid at room temperature and melt or dissolve at body temperature. Commonly used bases include cocoa butter, glycerinated gelatin, hydrogenated vegetable oil, polyethylene glycols of various molecular weights, and fatty esters of polyethylene stearate. [0054]
  • The dosage form and amount can be readily established by reference to known central nervous system treatment or prophylactic regiments. The amount of therapeutically active compound that is administered and the dosage regimen for treating a disease condition with the compounds and/or compositions of this invention depends on a variety of factors, including the age, weight, sex and medical condition of the subject, the severity of the disease, the route and frequency of administration, and the particular compound employed, as well as the pharmacokinetic properties of the individual treated, and thus may vary widely. The dosage will generally be lower if the compounds are administered locally rather than systemically, and for prevention rather than for treatment. Such treatments may be administered as often as necessary and for the period of time judged necessary by the treating physician. One of skill in the art will appreciate that the dosage regime or therapeutically effective amount of the inhibitor to be administrated may need to be optimized for each individual. The pharmaceutical compositions may contain active ingredient in the range of about 0.1 to 2000 mg, preferably in the range of about 0.5 to 500 mg and most preferably between about 1 and 200 mg. A daily dose of about 0.01 to 100 mg/kg body weight, preferably between about 0.1 and about 50 mg/kg body weight and most preferably from about 1 to 20 mg/kg body weight, may be appropriate. The daily dose can be administered in one to four doses per day. [0055]
  • All patents referenced herein are incorporated by reference. [0056]
  • Although this invention has been described with respect to specific embodiments, the details of these embodiments are not to be construed as limitations. [0057]

Claims (15)

1. A method of treating an dementia in a subject, said method comprising treating the subject with a therapeutically-effective amount of a compound of Formula I
Figure US20040242667A1-20041202-C00003
wherein R2 is selected from hydrido, alkyl, haloalkyl, alkoxycarbonyl, cyano, cyanoalkyl, carboxyl, aminocarbonyl, alkylaminocarbonyl, cycloalkylaminocarbonyl, arylaminocarbonyl, carboxyalkylaminocarbonyl, carboxyalkyl, aralkoxycarbonylalkylaminocarbonyl, alkoxycarbonylcyanoalkenyl and hydroxyalkyl;
wherein R3 is selected from hydrido, alkyl, cyano, hydroxyalkyl, cycloalkyl, alkylsulfonyl and halo; and
wherein R4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkenyl and heterocyclic; wherein R4 is optionally substituted at a substitutable position with one or more radicals selected from halo, alkylthio, alkylsulfonyl, cyano, nitro, haloalkyl, alkyl, hydroxyl, alkenyl, hydroxyalkyl, carboxyl, cycloalkyl, alkylamino, dialkylamino, alkoxycarbonyl, aminocarbonyl, alkoxy, haloalkoxy, sulfamyl, heterocyclic and amino;
or a pharmaceutically-acceptable salt or derivative thereof.
2. The method of claim 1 wherein R2 is selected from hydrido, C1-C10-alkyl, C1-C6-haloalkyl, C1-C6-alkoxycarbonyl, cyano, C1-C6-cyanoalkyl, carboxyl, aminocarbonyl, N—C1-C6-alkylaminocarbonyl, C3-C7-cycloalkylaminocarbonyl, arylaminocarbonyl, carboxy-C1-C6-alkylaminocarbonyl, aryl-C1-C6-alkoxycarbonylalkylaminocarbonyl, carboxy-C1-C6-alkyl, C1-C6-alkoxycarbonylcyanoalkenyl and C1-C6-hydroxyalkyl; wherein R3 is selected from hydrido, C1-C10-alkyl, cyano, C1-C6-hydroxyalkyl, C3-C7-cycloalkyl, C1-C6-alkylsulfonyl and halo; and wherein R4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkenyl and heterocyclic; wherein R4 is optionally substituted at a substitutable position with one or more radicals selected from halo, C1-C6-alkylthio, C1-C6-alkylsulfonyl, cyano, nitro, C1-C6-haloalkyl, C1-C10-alkyl, hydroxyl, C2-C6-alkenyl, C1-C6-hydroxyalkyl, carboxyl, C3-C7-cycloalkyl, N—C1-C6-alkylamino, di-N—C1-C6-alkylamino, C1-C6-alkoxycarbonyl, aminocarbonyl, C1-C6-alkoxy, C1-C6-haloalkoxy, sulfamyl, five or six membered heterocyclic and amino; or a pharmaceutically-acceptable salt or derivative thereof.
3. The method of claim 2 wherein the compound is selected from compounds, and their pharmaceutically acceptable salts, of the group consisting of
4-[5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-phenyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-fluorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-methoxyphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-chlorophenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[4-chloro-5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-(4-methylphenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-phenyl-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-(4-methoxyphenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-cyano-5-(4-fluorophenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-(3-fluoro-4-methoxyphenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(3-fluoro-4-methoxyphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[4-chloro-5-phenyl-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-chlorophenyl)-3-(hydroxymethyl)-1H-pyrazol-1-yl]benzenesulfonamide; and
4-[5-(4-(N,N-dimethylamino)phenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide.
4. The method of claim 2 wherein the compound is 4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide, or a pharmaceutically-acceptable salt thereof.
5. The method of claim 2 wherein the compound is 4-[5-(4-chlorophenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide, or a pharmaceutically-acceptable salt thereof.
6. The method of claim 2 where the compound is 4-[5-(3-fluoro-4-methoxyphenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide, or a pharmaceutically-acceptable salt thereof.
7. The method of claim 1 wherein the dementia is selected from Alzheimer's disease, vascular dementia, multi-infarct dementia, pre-senile dementia, alcoholic dementia, and senile dementia.
8. The method of claim 7 wherein the dementia is Alzheimer's disease.
9. A method of preventing a dementia selected from Alzheimer's disease, vascular dementia, multi-infarct dementia, pre-senile dementia, alcoholic dementia, and senile dementia, in a subject in need of such prevention, the method comprising treating said subject with a therapeutically-effective amount of a compound of
Figure US20040242667A1-20041202-C00004
wherein R2 is selected from hydrido, alkyl, haloalkyl, alkoxycarbonyl, cyano, cyanoalkyl, carboxyl, aminocarbonyl, alkylaminocarbonyl, cycloalkylaminocarbonyl, arylaminocarbonyl, carboxyalkylaminocarbonyl, carboxyalkyl, aralkoxycarbonylalkylaminocarbonyl, aminocarbonylalkyl, alkoxycarbonylcyanoalkenyl and hydroxyalkyl;
wherein R3 is selected from hydrido, alkyl, cyano, hydroxyalkyl, cycloalkyl, alkylsulfonyl and halo; and
wherein R4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkenyl and heterocyclic; wherein R4 is optionally substituted at a substitutable position with one or more radicals selected from halo, alkylthio, alkylsulfonyl, cyano, nitro, haloalkyl, alkyl, hydroxyl, alkenyl, hydroxyalkyl, carboxyl, cycloalkyl, alkylamino, dialkylamino, alkoxycarbonyl, aminocarbonyl, alkoxy, haloalkoxy, sulfamyl, heterocyclic and amino;
or a pharmaceutically-acceptable salt or derivative thereof.
10. The method of claim 9 wherein R2 is selected from hydrido, C1-C10-alkyl, C1-C6-haloalkyl, C1-C6-alkoxycarbonyl, cyano, C1-C6-cyanoalkyl, carboxyl, aminocarbonyl, C1-C6-N-alkylaminocarbonyl, C3-C7-cycloalkylaminocarbonyl, arylaminocarbonyl, carboxy-C1-C6-alkylaminocarbonyl, aminocarbonyl-C1-C6-alkyl, aryl-C1-C6-alkoxycarbonylalkylaminocarbonyl, carboxy-C1-C6-alkyl, C1-C6-alkoxycarbonylcyanoalkenyl and C1-C6-hydroxyalkyl; wherein R3 is selected from hydrido, C1-C10-alkyl, cyano, C1-C6-hydroxyalkyl, C3-C7-cycloalkyl, C1-C6-alkylsulfonyl and halo; and wherein R4 is selected from aralkenyl, aryl, cycloalkyl, cycloalkenyl and heterocyclic; wherein R4 is optionally substituted at a substitutable position with one or more radicals selected from halo, C1-C6-alkylthio, C1-C6-alkylsulfonyl, cyano, nitro, C1-C6-haloalkyl, C1-C10-alkyl, hydroxyl, C2-C6-alkenyl, C1-C6-hydroxyalkyl, carboxyl, C3-C7-cycloalkyl, C1-C6-N-alkylamino, C1-C6-N-dialkylamino, C1-C6-alkoxycarbonyl, aminocarbonyl, C1-C6-alkoxy, C1-C6-haloalkoxy, sulfamyl, five or six membered heterocyclic and amino; or a pharmaceutically-acceptable salt or derivative thereof.
11. The method of claim 10 wherein the compound is selected from compounds, and their pharmaceutically acceptable salts, of the group consisting of
4-[5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-phenyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-fluorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-methoxyphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-chlorophenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[4-chloro-5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-(4-methylphenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-phenyl-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-(4-methoxyphenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-cyano-5-(4-fluorophenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[3-(difluoromethyl)-5-(3-fluoro-4-methoxyphenyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(3-fluoro-4-methoxyphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide;
4-[4-chloro-5-phenyl-1H-pyrazol-1-yl]benzenesulfonamide;
4-[5-(4-chlorophenyl)-3-(hydroxymethyl)-1H-pyrazol-1-yl]benzenesulfonamide; and
4-[5-(4-(N,N-dimethylamino)phenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide.
12. The method of claim 10 wherein the compound is 4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide, or a pharmaceutically-acceptable salt thereof.
13. The method of claim 10 wherein the compound is 4-[5-(4-chlorophenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide, or a pharmaceutically-acceptable salt thereof.
14. The method of claim 10 where the compound is 4-[5-(3-fluoro-4-methoxyphenyl)-3-(difluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide, or a pharmaceutically-acceptable salt thereof.
15-28. (Cancelled)
US10/884,906 1997-04-03 2004-07-06 Method of using cyclooxegenase-2 inhibitors in the treatment and prevention of dementia Abandoned US20040242667A1 (en)

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